the nra said it wanted to give the victims' families time to mourn t. nra plans a news conference friday. >>> ktvu.com has more kovrng of the connecticut school shooting. we posted a special tab for you at the top of our home page including a link to more information about bay area vigils. >>> grab your coat. tonight is expected to be one of the coldest nights of the year with a freeze warning in effect in some bay area neighborhoods. temperatures have already start today drop, right. >> gasia, that's right. it is really cold out here. we are at union square and you can see there's a lot of people out shopping. after all, it is only one week before christmas, and looks like most shoppers were prepared for the dip in temperature bundled up in heavy coats, hats and gloves. now, we also visited the city's largest emergency winter shelter for the homeless to see how it's faring. st. mary's cathedral is amongst four churches in san francisco working with the city to help house and feed homeless folks to get them inside from the cold. this shelter offers hot